CVE-2026-64468
binder: fix UAF in binder_free_transaction()
Description
In the Linux kernel, the following vulnerability has been resolved: binder: fix UAF in binder_free_transaction() In binder_free_transaction(), the t->to_proc is read under the t->lock. However, once the t->lock is dropped, the to_proc can die in parallel. This leads to a use-after-free error when we attempt to acquire its inner lock right afterwards: ================================================================== BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x1a0 Write of size 4 at addr ffff00001125da70 by task B/672 CPU: 20 UID: 0 PID: 672 Comm: B Not tainted 7.1.0-rc6-00284-g8e65320d91cd #4 PREEMPT Hardware name: linux,dummy-virt (DT) Call trace: _raw_spin_lock+0xe4/0x1a0 binder_free_transaction+0x8c/0x320 binder_send_failed_reply+0x21c/0x2f8 binder_thread_release+0x488/0x7e0 binder_ioctl+0x12c0/0x29a0 [...] Allocated by task 675: __kmalloc_cache_noprof+0x174/0x444 binder_open+0x118/0xb70 do_dentry_open+0x374/0x1040 vfs_open+0x58/0x3bc [...] Freed by task 212: __kasan_slab_free+0x58/0x80 kfree+0x1a0/0x4a4 binder_proc_dec_tmpref+0x32c/0x5e0 binder_deferred_func+0xc48/0x104c process_one_work+0x53c/0xbc0 [...] ================================================================== To prevent this, pin the target thread (t->to_thread) to guarantee the target process remains alive. Undelivered transactions without a target thread are already safe, as the target process can only be the current context in those paths.
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
July 25, 2026, 10:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-64468
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Pin the target thread using t->to_thread.
- Ensure target process remains alive.
- Review transaction handling logic.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64468.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64468 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64468
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64468 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64468 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a370003cc301d4361bae20c9ef615f89bf8d1e8a', 'lessThan': '5602a43f251c3d75312df91a422675fc00ca3dce', 'versionType': 'git'}, {'status': 'affected', 'version': 'a370003cc301d4361bae20c9ef615f89bf8d1e8a', 'lessThan': '0be901ab1dcc4af59b88f2e324493bb283850167', 'versionType': 'git'}, {'status': 'affected', 'version': 'a370003cc301d4361bae20c9ef615f89bf8d1e8a', 'lessThan': '48aeda9f8039e4a6971d1804578efde7f2c01eda', 'versionType': 'git'}, {'status': 'affected', 'version': 'a370003cc301d4361bae20c9ef615f89bf8d1e8a', 'lessThan': '45df558c543bb5543bacc8065fd7c567740781e5', 'versionType': 'git'}, {'status': 'affected', 'version': 'a370003cc301d4361bae20c9ef615f89bf8d1e8a', 'lessThan': 'd45ef513eed1abebfec90c3cfb6ae50c2a4182db', 'versionType': 'git'}, {'status': 'affected', 'version': 'a370003cc301d4361bae20c9ef615f89bf8d1e8a', 'lessThan': '328ccf32acb87e8bbb1fe2b065068c574e4db2bf', 'versionType': 'git'}, {'status': 'affected', 'version': 'a370003cc301d4361bae20c9ef615f89bf8d1e8a', 'lessThan': '0f15f0f6ca5df566275ce517f257af2559528b41', 'versionType': 'git'}, {'status': 'affected', 'version': 'a370003cc301d4361bae20c9ef615f89bf8d1e8a', 'lessThan': 'f223d27a546c1e1f48d38fd67760e78f068fe8c4', 'versionType': 'git'}, {'status': 'affected', 'version': 'a4a3c070b8760f71c8311399fa9bfe67c8629bca', 'versionType': 'git'}, {'status': 'affected', 'version': '22068d49d09d2b3890e19d7b2048a33340f992da', 'versionType': 'git'}, {'status': 'affected', 'version': '0e3b977a8f1be01dcfa0baae68851b1f55f2a0a9', 'versionType': 'git'}, {'status': 'affected', 'version': '4.14.136', 'lessThan': '4.15', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.19.64', 'lessThan': '4.20', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.1.15', 'lessThan': '5.2', 'versionType': 'semver'}], 'programFiles': ['drivers/android/binder.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.2', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/android/binder.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: binder: fix UAF in binder_free_transaction() In binder_free_transaction(), the t->to_proc is read under the t->lock. However, once the t->lock is dropped, the to_proc can die in parallel. This leads to a use-after-free error when we attempt to acquire its inner lock right afterwards: ================================================================== BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x1a0 Write of size 4 at addr ffff00001125da70 by task B/672 CPU: 20 UID: 0 PID: 672 Comm: B Not tainted 7.1.0-rc6-00284-g8e65320d91cd #4 PREEMPT Hardware name: linux,dummy-virt (DT) Call trace: _raw_spin_lock+0xe4/0x1a0 binder_free_transaction+0x8c/0x320 binder_send_failed_reply+0x21c/0x2f8 binder_thread_release+0x488/0x7e0 binder_ioctl+0x12c0/0x29a0 [...] Allocated by task 675: __kmalloc_cache_noprof+0x174/0x444 binder_open+0x118/0xb70 do_dentry_open+0x374/0x1040 vfs_open+0x58/0x3bc [...] Freed by task 212: __kasan_slab_free+0x58/0x80 kfree+0x1a0/0x4a4 binder_proc_dec_tmpref+0x32c/0x5e0 binder_deferred_func+0xc48/0x104c process_one_work+0x53c/0xbc0 [...] ================================================================== To prevent this, pin the target thread (t->to_thread) to guarantee the target process remains alive. Undelivered transactions without a target thread are already safe, as the target process can only be the current context in those paths. Added Reference https://git.kernel.org/stable/c/0be901ab1dcc4af59b88f2e324493bb283850167 Added Reference https://git.kernel.org/stable/c/0f15f0f6ca5df566275ce517f257af2559528b41 Added Reference https://git.kernel.org/stable/c/328ccf32acb87e8bbb1fe2b065068c574e4db2bf Added Reference https://git.kernel.org/stable/c/45df558c543bb5543bacc8065fd7c567740781e5 Added Reference https://git.kernel.org/stable/c/48aeda9f8039e4a6971d1804578efde7f2c01eda Added Reference https://git.kernel.org/stable/c/5602a43f251c3d75312df91a422675fc00ca3dce Added Reference https://git.kernel.org/stable/c/d45ef513eed1abebfec90c3cfb6ae50c2a4182db Added Reference https://git.kernel.org/stable/c/f223d27a546c1e1f48d38fd67760e78f068fe8c4